Ans all from the same sources most with the same fundamental flaws, talking points and agenda. Repeating a lie which is what they are doing is not working this time around obviously.
Polling flaws are categorical and methodological, not overtly political.
Margins of error are greatly reduced when one considers results obtained by multiple methodologies over time. Thus, when virtually every reputable poll shows Donald Trump getting his clock cleaned by the Wicked Witch of Westchester, it is not likely the result of flawed analysis. The idea that there is some vast underground tsunami of disgruntled voters who will rise up on Election Day to wash away the old electoral landscape is a fanciful one, a wishful dream.
In truth, the flaws lie with the candidate, not with the polls. Trump has both the time and resources to correct this situation; the question is: will he?